CN220581418U - Quick-closing hydraulic cylinder - Google Patents
Quick-closing hydraulic cylinder Download PDFInfo
- Publication number
- CN220581418U CN220581418U CN202322295806.5U CN202322295806U CN220581418U CN 220581418 U CN220581418 U CN 220581418U CN 202322295806 U CN202322295806 U CN 202322295806U CN 220581418 U CN220581418 U CN 220581418U
- Authority
- CN
- China
- Prior art keywords
- piston rod
- cylinder
- piston
- cylinder assembly
- quick
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006073 displacement reaction Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 10
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 239000003921 oil Substances 0.000 description 30
- 230000001681 protective effect Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Actuator (AREA)
Abstract
The utility model discloses a quick-closing hydraulic cylinder, which comprises: the cylinder assembly comprises a cylinder assembly body, a piston, a first piston rod, a second piston rod and a spring, wherein the first piston rod and the second piston rod are fixedly connected, the piston is fixed on the first piston rod, the first piston rod and the second piston rod are both in sliding connection with the cylinder assembly body, the first piston rod and the second piston rod respectively penetrate through the front end and the rear end of the cylinder assembly body, the spring sleeved on the first piston rod is arranged between the piston and the front end of the cylinder assembly body, and a rodless oil cavity is formed by encircling the cylinder assembly body, the piston and the second piston rod. Compared with the prior art, in the utility model, when the first piston rod is retracted, the spring drives the piston to accelerate and move backwards; secondly, the capacity of the rodless oil cavity can be effectively reduced by arranging the second piston rod, so that the first piston rod is retracted into place, and only little oil is required to be discharged. The first piston rod can retract to the position in a short time by matching the two, so that the requirement of the closing speed of the gas valve is met.
Description
Technical Field
The utility model relates to the technical field of oil cylinder manufacturing, in particular to a quick-closing hydraulic cylinder.
Background
The hydraulic cylinder is basically composed of a cylinder barrel, a cylinder cover, a piston and a piston rod, and is a linear motion type actuating element with output force and effective area of the piston being in direct proportion to pressure difference on two sides of the effective area of the piston. The inner cavity of the hydraulic cylinder is divided into two mutually independent closed volume cavities by the hydraulic cylinder through the piston. When one of the volume cavities is filled with oil, the rigid connecting body formed by the piston and the piston rod can move towards the other volume cavity, and the oil is discharged from the one volume cavity and the other volume cavity while the piston moves. Because the hydraulic oil is a continuous process, when emergency situations are met, the relative motion between the piston and the cylinder body is difficult to quickly respond, for example, a hydraulic cylinder is used for opening and closing the gas valve in the coking gas environment of the metallurgical industry, and when power failure occurs, the conventional hydraulic cylinder needs tens of seconds to close the gas valve, and the closing time is difficult to meet the safety requirement.
Disclosure of Invention
First, the technical problem to be solved
Based on the above, the utility model provides a quick-closing hydraulic cylinder, which is used for solving the problem that the conventional hydraulic cylinder in the prior art consumes too much time in a mode of closing a valve through hydraulic oil in and out.
(II) technical scheme
The present utility model is directed to overcoming, or at least partially solving, the above problems, and provides a quick-closing hydraulic cylinder, comprising: the cylinder assembly comprises a cylinder assembly body, a piston, a first piston rod, a second piston rod and a spring, wherein the first piston rod and the second piston rod are fixedly connected, the piston is fixed on the first piston rod, the first piston rod and the second piston rod are both in sliding connection with the cylinder assembly body, the first piston rod and the second piston rod penetrate through the front end and the rear end of the cylinder assembly body respectively, the spring sleeved on the first piston rod is arranged between the piston and the front end of the cylinder assembly body, the piston and the second piston rod enclose to form a rodless oil cavity, and the diameter of the second piston rod is larger than that of the first piston rod.
Preferably, a piston rod protection cover is fixed at the rear end of the cylinder assembly, and the second piston rod penetrates through the cylinder assembly and stretches into the piston rod protection cover.
Preferably, the cylinder assembly comprises a cylinder comprising a first cylinder and a second cylinder, the first cylinder having an inner diameter greater than the inner diameter of the second cylinder, the piston being in sliding connection with the first cylinder.
Preferably, a spacer bush is arranged between the spring and the piston, and the spacer bush is sleeved on the first piston rod.
Preferably, the first piston rod and the second piston rod are in threaded connection, and the first piston rod and the second piston rod are fixed by a locking screw.
Preferably, the cylinder assembly further comprises a front cover and a cylinder bottom, which are fixedly connected with the cylinder respectively.
Preferably, the rear end of the cylinder barrel is provided with a stepped hole, the cylinder bottom is in threaded connection with the cylinder barrel, and a first sealing ring is arranged between the cylinder barrel and the cylinder bottom.
Preferably, a supporting ring and a second sealing ring are arranged between the cylinder bottom and the second piston rod, and a supporting ring and a second sealing ring are also arranged between the cylinder barrel and the first piston rod.
Preferably, a displacement sensor is fixed on the outer side of the piston rod protective cover, a magnetic ring of the displacement sensor is fixed on the second piston rod, and a core rod of the displacement sensor penetrates through the piston rod protective cover and the magnetic ring to be in sliding connection with the second piston rod.
Preferably, a sensor protection cover is fixed on the outer side of the piston rod protection cover, and the displacement sensor is located in the sensor protection cover.
(III) beneficial effects
The quick-closing hydraulic cylinder has the following advantages:
in the utility model, when the first piston rod is retracted, a spring arranged between the piston and the front cover drives the piston to accelerate and move backwards; secondly, the capacity of the rodless oil cavity can be effectively reduced by arranging the second piston rod, so that the first piston rod is retracted into place, and only little oil is required to be discharged. The first piston rod can retract to the position in a short time by matching the two, so that the requirement of the closing speed of the gas valve is met. And secondly, the diameter of the second piston rod is larger than that of the first piston rod, so that the capacity of the rodless oil cavity can be further reduced, and the retraction speed of the first piston rod is improved.
Drawings
The features and advantages of the present utility model will be more clearly understood by reference to the accompanying drawings, which are illustrative and should not be construed as limiting the utility model in any way, in which:
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is an enlarged schematic view of the structure at a in fig. 1.
Reference numerals illustrate:
1. the cylinder assembly comprises a cylinder barrel assembly body, a piston, a first piston rod, a second piston rod, a spring, a piston rod protecting cover, a spacer bush, a locking screw, a first sealing ring, a cylinder barrel, a front cover, a cylinder bottom, a first cylinder body, a second cylinder body, a supporting ring, a second sealing ring, a supporting ring, a displacement sensor, a magnetic ring, a core bar and a sensor protecting cover.
Detailed Description
In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the utility model, which is therefore not limited to the specific embodiments disclosed below.
Referring to fig. 1, this embodiment provides a quick-closing hydraulic cylinder, including: the cylinder assembly comprises a cylinder assembly 1, a piston 2, a first piston rod 3, a second piston rod 4 and a spring 5, wherein the first piston rod 3 and the second piston rod 4 are fixedly connected, the piston 2 is fixed on the first piston rod 3, the first piston rod 3 and the second piston rod 4 are in sliding connection with the cylinder assembly 1, the first piston rod 3 and the second piston rod 4 respectively penetrate through the front end and the rear end of the cylinder assembly 1, the spring 5 sleeved on the first piston rod 3 is arranged between the piston 2 and the front end of the cylinder assembly 1, the piston 2 and the second piston rod 4 are enclosed to form a rodless oil cavity, the rear end of the cylinder assembly 1 is provided with an oil port communicated with the rodless oil cavity, the piston 2, the cylinder assembly 1 and the first piston rod 3 are enclosed to form a rod oil cavity, and the diameter of the second piston rod 4 is larger than that of the first piston rod 3, and the capacity of the rodless oil cavity can be effectively reduced.
When the gas valve needs to be closed in factory power failure, the first piston rod 3 is retracted, oil in the rodless oil cavity flows into the oil tank through the oil port, in the process, the elastic force of the spring 5 drives the piston 2 to move backwards rapidly, the second piston rod 4 is arranged to enable the rodless oil cavity to be annular, the capacity of the rodless oil cavity is greatly reduced, and the arrangement can enable oil in the rodless oil cavity to be emptied rapidly, namely the first piston rod 3 can retract rapidly to be in place. The smaller the amount of oil in the rod-less oil chamber, the less time is required to empty the rod-less oil chamber, i.e., the shorter the time the first piston rod 3 is retracted into place, with the oil discharge speed unchanged. According to the utility model, the driving force of the piston 2 moving backwards is increased through the spring 5, the oil discharging speed is increased, and the oil quantity in the rodless oil cavity is reduced by matching with the arrangement of the second piston 2, so that the retraction speed of the first piston rod 3 can be increased rapidly. Compared with the retraction speed of tens of seconds of a conventional hydraulic cylinder, the quick-closing hydraulic cylinder provided by the utility model can complete the retraction of the first piston rod 3 within a few seconds, thereby meeting the requirement of the closing speed of a gas valve.
As another embodiment of the present utility model: a piston rod protection cover 6 is fixed at the rear end of the cylinder assembly 1, and a second piston rod 4 extends through the cylinder assembly 1 into the piston rod protection cover 6. The provision of the piston rod protecting cover 6 can effectively prevent dust from contaminating the second piston rod 4.
As another embodiment of the present utility model: the cylinder assembly 1 comprises a cylinder 11, the cylinder 11 comprising a first cylinder 111 and a second cylinder 112, the first cylinder 111 having an inner diameter which is larger than the inner diameter of the second cylinder 112, the piston 2 being in sliding connection with the first cylinder 111. The first cylinder 111 and the second cylinder 112 form a step, which can limit the piston 2 and prevent the piston 2 from moving to the front end of the cylinder 11 to crush the spring 5.
As another embodiment of the present utility model: a spacer 7 is arranged between the spring 5 and the piston 2, the spacer 7 is sleeved on the first piston rod 3, one spacer 7 is arranged between the piston 2 and the spring 5, the hardness of the spacer 7 is greater than that of the piston 2, and the piston 2 can be effectively protected by the aid of the structural design.
One embodiment of the fixed connection of the first piston rod 3 and the second piston rod 4: with reference to fig. 2, the first piston rod 3 and the second piston rod 4 are threadedly coupled, and the first piston rod 3 and the second piston rod 4 are fixed by a locking screw 8.
As another embodiment of the present utility model: the cylinder assembly 1 further comprises a front cover 12 and a cylinder bottom 13, the front cover 12 and the cylinder bottom 13 being fixedly connected with the cylinder 11, respectively, the spring 5 being arranged between the spacer 7 and the front cover 12.
As another embodiment of the present utility model: the rear end of cylinder 11 is equipped with the shoulder hole, and cylinder bottom 13 and cylinder 11 threaded connection are equipped with first sealing washer 9 between cylinder 11 and the cylinder bottom 13, and in the aperture of shoulder hole was located to first sealing washer 9, the macropore of shoulder hole was equipped with the internal thread, and cylinder bottom 13 was equipped with the external screw thread with cylinder 11 looks adaptation.
As another embodiment of the present utility model: a supporting ring 100 and a second sealing ring 200 are arranged between the cylinder bottom 13 and the second piston rod 4, and a supporting ring 100 and a second sealing ring 200 are also arranged between the cylinder barrel 11 and the first piston rod 3.
As another embodiment of the present utility model: the outer side of the piston rod protective cover 6 is fixed with a displacement sensor 300, a magnetic ring 3001 of the displacement sensor 300 is fixed on the second piston rod 4, and a core rod 3002 of the displacement sensor 300 sequentially penetrates through the piston rod protective cover 6 and the magnetic ring 3001 to be in sliding connection with the second piston rod 4. The stroke of the first piston rod 3 can be accurately fed back through the displacement sensor 300, so that the degree of opening of the valve is known.
As another embodiment of the present utility model: the sensor protection cover 400 is fixed to the outer side of the piston rod protection cover 6, the sensor protection cover 400 is fixed to the piston rod protection cover 6 through bolts, and the displacement sensor 300 is located in the sensor protection cover 400. The sensor protection cover 400 is provided for protecting the displacement sensor 300.
As another embodiment of the present utility model: the piston rod boot 6 comprises: the cover cylinder, the end cover and the fixed plate are fixed with the cylinder bottom 13 through bolts, the cover cylinder is in threaded connection with the fixed plate, the end cover is in threaded connection with the cover cylinder, and the core rod 3002 penetrates through the end cover.
Specifically, the cover cylinder is provided with an exhaust hole, and a filter screen is arranged in the exhaust hole.
Specifically, the sensor boot 400 is provided with a cable fixing lock sleeve.
In the utility model, when the first piston rod 3 is retracted, the spring 5 arranged between the piston 2 and the front cover 12 drives the piston 2 to move backwards in an accelerating way; secondly, the provision of the second piston rod 4 is effective to reduce the capacity of the rodless oil chamber so that only a small amount of oil needs to be discharged for retraction of the first piston rod 3 into position. The first piston rod 3 can be retracted in place in a short time by matching the two, so that the requirement of the closing speed of the gas valve is met. Secondly, the diameter of the second piston rod 4 is larger than that of the first piston rod 3, so that the capacity of the rodless oil cavity can be further reduced, and the retraction speed of the first piston rod 3 can be improved.
Finally, the method of the present utility model is only a preferred embodiment and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.
Claims (10)
1. A quick-closing hydraulic cylinder, comprising: the cylinder assembly comprises a cylinder assembly body, a piston, a first piston rod, a second piston rod and a spring, wherein the first piston rod and the second piston rod are fixedly connected, the piston is fixed on the first piston rod, the first piston rod and the second piston rod are both in sliding connection with the cylinder assembly body, the first piston rod and the second piston rod penetrate through the front end and the rear end of the cylinder assembly body respectively, the spring sleeved on the first piston rod is arranged between the piston and the front end of the cylinder assembly body, the piston and the second piston rod enclose to form a rodless oil cavity, and the diameter of the second piston rod is larger than that of the first piston rod.
2. The quick-closing hydraulic cylinder as recited in claim 1, wherein a piston rod protection cover is fixed to a rear end of the cylinder assembly, and the second piston rod extends into the piston rod protection cover through the cylinder assembly.
3. The quick-closing hydraulic cylinder of claim 2, wherein the cylinder assembly comprises a cylinder barrel including a first barrel and a second barrel, the first barrel having an inner diameter greater than an inner diameter of the second barrel, the piston being slidably coupled to the first barrel.
4. The quick closing hydraulic cylinder of claim 1, wherein a spacer is disposed between the spring and the piston, the spacer being sleeved on the first piston rod.
5. The quick closing hydraulic cylinder of claim 1, wherein the first and second piston rods are threadably connected, the first and second piston rods being secured by a locking screw.
6. A quick-closing hydraulic cylinder as claimed in claim 3, wherein the cylinder assembly further comprises a front cover and a cylinder bottom, the front cover and the cylinder bottom being fixedly connected to the cylinder respectively.
7. The quick closing hydraulic cylinder as claimed in claim 6, wherein the rear end of the cylinder is provided with a stepped hole, the cylinder bottom is in threaded connection with the cylinder, and a first sealing ring is arranged between the cylinder and the cylinder bottom.
8. The quick closing hydraulic cylinder as claimed in claim 7, wherein a support ring and a second seal ring are provided between the cylinder bottom and the second piston rod, and a support ring and a second seal ring are also provided between the cylinder tube and the first piston rod.
9. The quick closing hydraulic cylinder according to claim 1, wherein a displacement sensor is fixed on the outer side of the piston rod protection cover, a magnetic ring of the displacement sensor is fixed on the second piston rod, and a core rod of the displacement sensor penetrates through the piston rod protection cover and the magnetic ring to be in sliding connection with the second piston rod.
10. The quick closing hydraulic cylinder of claim 9, wherein a sensor protection cover is fixed to an outer side of the piston rod protection cover, and the displacement sensor is located in the sensor protection cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322295806.5U CN220581418U (en) | 2023-08-25 | 2023-08-25 | Quick-closing hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322295806.5U CN220581418U (en) | 2023-08-25 | 2023-08-25 | Quick-closing hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220581418U true CN220581418U (en) | 2024-03-12 |
Family
ID=90116431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322295806.5U Active CN220581418U (en) | 2023-08-25 | 2023-08-25 | Quick-closing hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220581418U (en) |
-
2023
- 2023-08-25 CN CN202322295806.5U patent/CN220581418U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205578403U (en) | Butter type hydraulic oil cylinder | |
| CN220581418U (en) | Quick-closing hydraulic cylinder | |
| CN109630482B (en) | Spring piston type pressure accumulator with one-way valve | |
| CN201293003Y (en) | Double-action plunger type oil cylinder | |
| CN217783908U (en) | Novel two-stage telescopic oil cylinder | |
| CN108105198A (en) | A kind of single-action hydraulic cylinder | |
| CN104806599A (en) | Boosting type mechanical locking type hydraulic cylinder | |
| CN213929000U (en) | High-pressure pull rod cylinder | |
| CN212272716U (en) | Two-stage pressurizing hydraulic cylinder | |
| CN208845477U (en) | Hydraulic cylinder with second piston damping | |
| US3834282A (en) | Actuator and latch | |
| CN218207672U (en) | Take buffer structure's electronic jar | |
| US20070101861A1 (en) | Two-speed cylinder | |
| CN212250692U (en) | Self-locking hydraulic oil cylinder in cylinder | |
| CN214247857U (en) | Hydraulic oil cylinder integrating balance valve into cylinder body | |
| CN111042689A (en) | Special buffer for heavy hydraulic opening and closing device | |
| CN218493940U (en) | Actuating cylinder | |
| CN112145497A (en) | Sectional type linkage double-rod plunger hydraulic cylinder | |
| CN212838684U (en) | Quick-change sealing vertical mill oil cylinder | |
| CN110578733A (en) | Energy storage type hydraulic cylinder with built-in piston rod | |
| CN214945423U (en) | Bidirectional buffering guide sleeve | |
| CN2171035Y (en) | Hydraulic buffer | |
| CN219176694U (en) | Hydro-cylinder locking mechanism | |
| CN215058574U (en) | Long-stroke oil cylinder with bidirectional buffer belt exhaust valve structure | |
| CN212455041U (en) | Novel air cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |